Scarifying and grading device for tractors



C. W. HOWE AND J. L. GARVER.

SCARIFYING AND GRADING DEVICE FOR TRACTORS.

Patented Apr. 5, 1921.

3 SHEETSSHEET 1 APPLICAT ON F ILED OCT: 21, 1919.

341 ucnto'u Wm 6 f- 21 a ww C. W. HOWE AND J. L. GARVER.

SCARIFYING AND GRADING DEVICE FOR TRACTORS.

APPLICATION HLED OCT. 21, 1919. 1,373,561. Patented Apr. 5,1921.

3 SHEiSSHEEI 2.

'INVEN TORS I ATTORNEY c. w. HOWE AND J. L. GARVER. SCARIFYING AND GRADING DEVICE FORTRACTORS.

. APPLICATION FILED OCT. 21' I919.

Patented Apr. 5, 1921 3 SHEETSSHEEI 3.

IHII IIHL IIII I17 6A W M Elmu'mdom 1 the provision of means that are readily at- UNITED STATES, PATENT OFFICE.

CHARLES W. HOWE, or DAYTON, nn JOSEPH canvas, or HAMILTON, OHIO.

scamrYnve Ann GRADING navrcn roe reacrons,

, Specification of Letters Patent. Patented Apr. 5, 1921.

Application filed ctober21, 1919. Serial No. 332,288.

To all whom it may concern:

Be it known that we, CHARLES W. Hown and Josnrrr L. Ganvnn, citizens of the United States, residing, respectively, in the city of Dayton, county of Montgomery, and State of Ohio, and in the city of Hamilton, county of Butler, and State of Ohio, have invented certain new and useful Improvements in Scarifying and Grading'Devices for Tractors, of which the following is a specification.

The principal object of the invention is tachable to tractors, for economically and efficiently scarifying and scraping roads and other surfaces.

Another object of the invention is the provision of means for easilyand independently forcing the scariiier and scraper into the surface to be graded, and raising them there from when desired.

Still another object of the invention is the provision of a device for holding the scarifier or scraper in a desired position with relation to the surface to be graded.

it is a further object of our invention to provide an adjustable arm for the scraper, and means for permitting a scarifying tooth to be easily removed and replaced in an inverted position to bring a more perfect edge into use without the necessity of inserting a new tooth.

Other important and incidental objects will be brought'out in the following specification and particularly set forth in the sub- ;Ioined claims.

The preferred form of embodiment of our invention is illustrated in the accompanying drawings, of which Figure 1 is a side elevational view of a tractor equipped with our improved, scarifierand scraper. Fig. 2 is an end view of the same. Fig. 3 is a plan view thereof. Fig. 4 is a detail view of a scariiiertooth. Fig; 5 is a detail view of the means for connectingthe pitch bar. to the scarifier. Fig. 6 is a detail view of the adjustable arm for the scraper. And Fig. 7 is a top plan view of the same.

Throughout the specification and drawings, similar reference characters denote corresponding parts. V

Referring to the accompanying drawings, the numerals 1, 1 designate the rear driving wheels, and 2the axle therefor, in a tractor 3, which is of a wellknown type. The axle 2 is of the common type, being divided in two sections for each of which there is an axle housing 4 that is connected at its inner end to an elongated transmission housing 5. From the latter each axle housing 4: gradually tapers towardits respective wheel 1,

where its size is considerably reduced as shown in the drawings.

Clamped to each axle housing 1,.a short distance from thetransmission casing 5,is

an arm 6 in the outer end of which is journaled the inner end of a shaft 7 on which'is fixed a spool or drum 8 for a scarifier cable .9. To permit a scraper cable 11 to pass over imder-surface ofthe outerend of its respective axle housing 4, and which is secured to a frame bar 14 above, that is curved to fit the top surface of said axle .housmg. The

frame bars 14, 1 1 project rearwardly beyond the axle housings, tosupport a cross bar 15 which 18 firmly secured to them.

Bolted to each end of the cross bar 15 is a clevis 16 that receives the head of a bolt 17 on whose threaded end is a nut '18 within a clevis 19. Hingedly secured between the free ends of the latter by means ofa bolt 20, is a: socket 21 within which is bolted a downwardly curved standard 221to which is secured, in an adjustable manner hereinafter to be described, a concave scraper 23. The first clevis and bolt construction hereinbefore described, permits the standards and scraper a rotary movement, while the second bolt andlclevis structure described enables them to be readily raised and lowered with relation to the surface to be scraped.

The scraper is adjustably secured to the standards 22 as follows. Referring to Figs. 6 and 7, there is riveted to the lower back portion of said scraper, two concave plates 2%, each of which hastwo outwardly projecting flanges 25, 25, between which the lower end of a respective standard 22 is secured by a pin 26. This construction permits a hinged movementto the scraper about the lower ends of the standards 22. To the parallel extensions 28, 28. To each of the latter there is hingedly secured a short bar 29 having teeth 30 formed in its lower sun 7 face. 22, receiving between their teeth a pin 31 These bars 29 straddle the standard projecting transversely from each side of said standard. When the scraper is moved to a desired inclined position, the bars are moved downwardly to a point where the pm 31 will be locked between their teeth, wlth the result that the scraper 23 will be firmly held in its adjusted position. l/Vhile I have shown this method of securing the scraper to the standards, any other means may be employed for this purpose without departin from the spirit of the invention.

or the purpose of raising and lowering the scraper 23, the following means are provided. Referring to Figs. 1 and 3, each frame member 14, a short distance in front of its respective axle housing 4, projects upwardly at an acute angle, being twisted at right angles and terminating in a perpendicular portion having an enlarged top which receives one end of a shaft 32 on which a drum or spool 33 is fast. On this shaft 32 a sheave 34 is loosely mounted to permit the scarifier cable 9 to pass around the spool 33 independent of the scraper cable 11. The inner end of the'shaft 32 is journaled in the top portion of a twisted bar 35 whose extreme lower end is V-shaped for attachment to the rear portion of the bar 14. The bar 35 projects upwardly in an inclined manner toward the inclined portion of the bar 14, and then away from the vertical plane of the latter bar, terminating in a perpendicular portion in the top of WhlCll the inner end of said shaft 32 is journaled. On the inner end of each of the shafts 32, a hand wheel 36 is fast, whereby the spools 33 may be conveniently turned by the driver who sits upon a seat 37 between said wheels behind a steering wheel 38.

For the purpose of preventing either one of the spools 33 from being turned, thereby to hold the scraper in a desired position, the following construction is provided. 1 Secured to the face of each wheel 36 is aperforated plate 39 of less diameter than said wheel. Adapted to be forced by a spring 40 into any one of the holes 41 in said plate, is a pin 42 whose'front end passes through a hole in its respective bar 35. The spring 40. surrounds said pin between the bar 35 and a transverse element 43 in the outer end of the pin, upon which said spring pulls to force the inner end of the pin into one of the holes 41 in the plate 39. (See Fig. 2.)

When it is desired to rotate one of the spools 33 by its respective hand wheel 36, the pin 42 belonging to that wheel, is with drawn by the following means. Referring to Fig. 2, there is secured to the inclined portion of each bar 35, a pivotal support 44 for a bell crank lever 45, one end of which is connected by a link 46 to its respective spring 42, while its other end is pivotally secured to the upper end of a downwardly projecting rod 47 which passes through a guide 48 on the frame member 14. On the lower end of the rod 47 is an inwardly projecting right-angled element 49. The driver of the tractor, by pressing his foot downwardly against the element 49, will be able to easily withdraw the pin 42 from the perof which receives a free end of the cable 11. After the cable end is passed through the clevis, it is pressed against itself by aclamp 51. It will be noted that one standard 22 is shorter than the other, which is for the reason that the scraper 23 has an inclined position with reference to the tractor. Each cable 11 passes upwardly around its respective spool 33, being wound tightly enough around its respective spool to permit it to raise the scraper when the wheel 36 is turned in one direction, or to draw it into the ground when said wheel is turned in the opposite direction. From each spool 33 the cable 11 passes downwardly over the loose sheave 12 on the shaft for the spool 8 below it, and then over an idler pulley 52, to the lower end of its respective clevis 50 on one of therstandards 22. Each idler pulley is journaled in the lower end of an inclined twisted bar 53, the surface of whose upper end is turned from a vertical to a horizontal plane and formed for even attachment to the front end of the bar 13. (See Fig. 1.)

The following described scarifying device is the one we prefer for the scarifier. Referring to Figs. 4 and .5, the numerals 54 and 55 designate two angle bars that are longitudinally disposed in manner to be brought together to clutch a series of scarii'ier teeth 56. Each scarifier tooth comprises a metallic member whose ends arebeveled as shown in Figs. 4 and 5, to bite into the ground. At its middle position, each tooth has a preferably square protuberant portion 57 adapted to be firmly gripped by the anglebars 54 and 55 after the ends of the tooth have been projected through slots 56 in said bars. Theangle bars 54 and 55 are then drawn tightly against the protuberant portions 57 of the scarifier teeth, by bolts 58 that receive nuts 59 on their threaded ends. By removing these nuts, the angle bars 54 and 55 may be readily drawn apart to release a scarifier tooth Furthermore, the, angle bars themselves may be readily removed from the forked ends of downward curved standards 61 that receive them, by removing the nuts 62 from bolts 63'that pass through said forked ends of the standardsbelow the angle bars. (See Fig. 1.)

The upper ends of the standards 61, of which there aretwo, have hingedly secured thereto, by means of bolts 65, clevises 66. (See Figs. 1 and 3.) The front end of each clevis 66 receives a nut 67 on a bolt 68 whose head is received by a clevis 69 whose free ends straddle, and are connected by a bolt 70 to, each rear end of a cross bar 71 and the lower foot-shaped end 72 of a bracket bar 73. At its middle portion the cross bar 71 is secured to the draw bar 74 of the tractor, while at its rear ends it is supported by the foot-shaped ends 72 of the bracket bar 73 which is secured at its middle countersunk portion 7 5 to said cross bar 71 directly above the draw bar 74,

whereby it is in a position to be firmly supported by the latter. This construction provides a rigid and substantial supporting structure for the scraper and scarifier standards. It is also a framework that may be easily attached to atractor, for the middle portion of the bracket bar, the middle part of the cross bar 71 and the draw bar 74, are connected together by the same bolts 75. The bracket bar 73 has upper horizontal corner portions 77 upon which rest the outer ends of the frame bars 14 to which the. cross bar 15 is secured (see Fig. 2). Brace bars 78, one for each idler pulley 52, receive at their lower ends shafts 79 on-which said pulleys are mounted, and at their upper ends said brace bars terminate inihorizontal portions which aresecured'tothe cross bar 71. (See Fig. 2.)

Referring to Fig. 1, there is secured to each one of the standards 63, a pair ofclevises 80 to each of which is secured one 7 end of a respective cable 9. Each cable 9 them into the ground, the following means are provided. Loosely mounted on the inner end of each shaft 7, is the lower end of a hand lever '81, while there isfixedly secured .tosaid shafts, one on each sideof a respective lever 81, a pair of ratchet wheels 82 and 83. (See Figs. 1 and 2.) 'Pivotallysecured to the lower end of each lever 81 by a pin8t, are two dogs 85, 85, one on one sideof said lever being inengagement with the ratchet wheel 82, while the-other dog is in engagement with the ratchet wheel 83.

Since the dogs 85, 85, are positioned to engage their respective ratchet wheels from different directions,-the lever 81 when pulled in one direction by the driver of the tractor, will rotate one of the ratchet wheels to turn the spool 33 fast on its respective shaft, in

the same direction. The rotation-of this spool will, in turn, draw upon the cable 9 which is tightly wound aroundit, to raise or pull down, the scarifier teeth 56. Both levers project upwardly at the side of the driver for convenient operation by him to raise the scarifier teeth whendesired, or to draw them into the ground during the scarifying operation.

The spools or drums S, 8 are tightly held against rotation, when desired, by'the following -means. Referring again to Figs. 1 and 2, there is fast on the front end of each shaft 7, a ratchet wheel 86, the teeth of which are adapted to be engaged from either side by the pawl 87 loosely mounted on a pin 88 secured to the frame arm 13. There are two of these pawls so mounted on each frame arm 13, one in front of, and the other one behind, a respective ratchet wheel 86. Then the spool 8 to which a ratchet wheel 86 belongs, is to be turned in one direction, the pawl 87 toward which it is to be turned should be withdrawn from engagement with said ratchet wheel by the hand, while the other pawl 87 is permitted to engage the teeth of said ratchet wheel to pre-- which it is now to be turned, is withdrawn from engagement with the teeth on the ratchet wheel '86, and the other pawl made ready to engage them for the purpose of preventing a backward rotation of said spool.

Having described our claim:

1. In a device of the type described, the combination with a tractor, of a scraper, means for hingedly securing the scraper to the tractor, a pair of winding devices, a cable on each winding device whose free ends are connected to a respective side of the scraper, and means convenient for operation by the driver, for turning each winding device independently of the other, to raise one or both sides of the scraper or draw one or both sides of the latter into the ground.

invention, we

2. In a device of the type described, the combination with a tractor, of a scraper, means for hingedly securing the scraper to the tractor, a winding-device for raising or lowering said scraper, a hand wheel for operating said windingdevice, an apertured disk on said wheel, a transverse pin,a spring adapted to force said pin in any one of the apertures in said disk to hold the winding device in a stationary position, and a footcontrolleddevice for withdrawing said pin from an aperture in said disk, to permit the hand wheel to be turned to raise or lower the scraper.

3. In a device of the type described, the combination with a tractor, of a scraper, means for hingedly securing the scraper to the tractor, a winding device for raising or lowering said scraper, a hand wheel for operating said winding device, an apertured disk on said wheel, a transverse pin, a spring adapted to force said pin into any one of the apertures in said disk to hold the winding device in a stationary position, a bell crank lever, a link connecting one end of said bell crank lever with said pin, and a rod having a right-angled foot-engaging projection, connected to the other end of said bell crank lever, whereby the driver of the tractor, by means of his foot, may withdraw said pin from an aperture in said disk, to permit the hand wheel to be turned toraise or lower both sides of the scarifier or draw one or both sides of the latter into the ground.

5. In a device of the type described, the combination with a tractor, of a scraper and a scarifier hi'ngedly secured thereto, a winding device for the scraper and a winding device for the scarifier, convenient foroperation by the driver, a cable for raising and lowering the scraper, passing from the winding device for the scraper loosely over the winding device for the scarifier, and a cable for raising and lowering the latter, passing from the winding device for the scarifier loosely over the winding device for the scraper, for the purpose specified.

6. In a device of the type described, the combination with a tractor, of a scraper and a scariiier hingedly secured thereto, a cable secured to the scraper and a cable secured to the scariiier, a drum around which the scraper cable is tightly. wound and a drum around which the scarifier cable is tightly wound, a shaft for each drum, a pulley loosely mounted on each shaft, the scraper cable passing from its drum over the pulley loosely mounted on the shaft for the scariiier drum, and the scarifier cable passing from its drum over the pulley loosely mounted on the shaft for the scraper drum, whereby the scraper may be raised or lowered independently of the scarifier.

7. In a device of the type described, the combination with a tractor, of a scarifier, means for hingedly securing the scarifier to the tractor, a pair of winding drums, acable on each drum whose free ends are connected to a respective side of the scarifier to raise the latter above, or draw it into, the ground.

8. In a device 01 the type described, the

combination with the rear axle of a tractor, of side frames secured to said axle, a pair oi winding devices supported by said iraincs, a scarifier hingedly secured to the rear portion of said tractor, cables connecting the winding devices with said scarifier for the purpose of raising and lowering the latter, to raise the scarifier above, or draw it into, the ground and a hand lever for turningsaid winding devices.

In testimony whereof we have hereunto set our hands this 20th day of ()ctober, 1919.

CHARLES w. HOWE. JOSEPH L. GARVER.

Witness llownrn S. SMITH. 

